ubuntu-cve-2026-21716
Vulnerability from osv_ubuntu
Published
2026-03-30 20:16
Modified
2026-05-20 15:24
Summary
Details

An incomplete fix for CVE-2024-36137 leaves FileHandle.chmod() and FileHandle.chown() in the promises API without the required permission checks, while their callback-based equivalents (fs.fchmod(), fs.fchown()) were correctly patched. As a result, code running under --permission with restricted --allow-fs-write can still use promise-based FileHandle methods to modify file permissions and ownership on already-open file descriptors, bypassing the intended write restrictions. This vulnerability affects 20.x, 22.x, 24.x, and 25.x processes using the Permission Model where --allow-fs-write is intentionally restricted.

Severity
3.3 (Low)
CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N
N/A (UNKNOWN)
medium
References
To clipboard 

{
  "affected": [
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "nodejs",
            "binary_version": "0.10.25~dfsg2-2ubuntu1.2+esm2"
          },
          {
            "binary_name": "nodejs-legacy",
            "binary_version": "0.10.25~dfsg2-2ubuntu1.2+esm2"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:Pro:14.04:LTS",
        "name": "nodejs",
        "purl": "pkg:deb/ubuntu/nodejs@0.10.25~dfsg2-2ubuntu1.2+esm2?arch=source\u0026distro=esm-infra-legacy/trusty"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "0.10.15~dfsg1-4",
        "0.10.21~dfsg1-1",
        "0.10.22~dfsg1-2",
        "0.10.23~dfsg1-1",
        "0.10.23~dfsg1-2",
        "0.10.23~dfsg1-3",
        "0.10.24~dfsg1-1",
        "0.10.25~dfsg2-2",
        "0.10.25~dfsg2-2ubuntu1",
        "0.10.25~dfsg2-2ubuntu1.2",
        "0.10.25~dfsg2-2ubuntu1.2+esm1",
        "0.10.25~dfsg2-2ubuntu1.2+esm2"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "nodejs",
            "binary_version": "4.2.6~dfsg-1ubuntu4.2+esm3"
          },
          {
            "binary_name": "nodejs-legacy",
            "binary_version": "4.2.6~dfsg-1ubuntu4.2+esm3"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:Pro:16.04:LTS",
        "name": "nodejs",
        "purl": "pkg:deb/ubuntu/nodejs@4.2.6~dfsg-1ubuntu4.2+esm3?arch=source\u0026distro=esm-apps/xenial"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "0.10.25~dfsg2-2ubuntu1",
        "4.2.2~dfsg-1",
        "4.2.3~dfsg-1",
        "4.2.4~dfsg-1ubuntu1",
        "4.2.4~dfsg-2",
        "4.2.6~dfsg-1ubuntu1",
        "4.2.6~dfsg-1ubuntu4",
        "4.2.6~dfsg-1ubuntu4.1",
        "4.2.6~dfsg-1ubuntu4.2",
        "4.2.6~dfsg-1ubuntu4.2+esm1",
        "4.2.6~dfsg-1ubuntu4.2+esm2",
        "4.2.6~dfsg-1ubuntu4.2+esm3"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "nodejs",
            "binary_version": "8.10.0~dfsg-2ubuntu0.4+esm6"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:Pro:18.04:LTS",
        "name": "nodejs",
        "purl": "pkg:deb/ubuntu/nodejs@8.10.0~dfsg-2ubuntu0.4+esm6?arch=source\u0026distro=esm-apps/bionic"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "6.11.4~dfsg-1ubuntu1",
        "6.11.4~dfsg-1ubuntu2",
        "6.12.0~dfsg-1ubuntu1",
        "6.12.0~dfsg-2ubuntu1",
        "6.12.0~dfsg-2ubuntu2",
        "8.10.0~dfsg-2",
        "8.10.0~dfsg-2ubuntu0.2",
        "8.10.0~dfsg-2ubuntu0.3",
        "8.10.0~dfsg-2ubuntu0.4",
        "8.10.0~dfsg-2ubuntu0.4+esm1",
        "8.10.0~dfsg-2ubuntu0.4+esm2",
        "8.10.0~dfsg-2ubuntu0.4+esm3",
        "8.10.0~dfsg-2ubuntu0.4+esm4",
        "8.10.0~dfsg-2ubuntu0.4+esm5",
        "8.10.0~dfsg-2ubuntu0.4+esm6"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "libnode64",
            "binary_version": "10.19.0~dfsg-3ubuntu1.6+esm2"
          },
          {
            "binary_name": "nodejs",
            "binary_version": "10.19.0~dfsg-3ubuntu1.6+esm2"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:Pro:20.04:LTS",
        "name": "nodejs",
        "purl": "pkg:deb/ubuntu/nodejs@10.19.0~dfsg-3ubuntu1.6+esm2?arch=source\u0026distro=esm-apps/focal"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "10.15.2~dfsg-2ubuntu1",
        "10.17.0~dfsg-2ubuntu4",
        "10.17.0~dfsg-2ubuntu6",
        "10.19.0~dfsg-3ubuntu1",
        "10.19.0~dfsg-3ubuntu1.1",
        "10.19.0~dfsg-3ubuntu1.2",
        "10.19.0~dfsg-3ubuntu1.3",
        "10.19.0~dfsg-3ubuntu1.5",
        "10.19.0~dfsg-3ubuntu1.6",
        "10.19.0~dfsg-3ubuntu1.6+esm2"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "libnode72",
            "binary_version": "12.22.9~dfsg-1ubuntu3.6+esm2"
          },
          {
            "binary_name": "nodejs",
            "binary_version": "12.22.9~dfsg-1ubuntu3.6+esm2"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:Pro:22.04:LTS",
        "name": "nodejs",
        "purl": "pkg:deb/ubuntu/nodejs@12.22.9~dfsg-1ubuntu3.6+esm2?arch=source\u0026distro=esm-apps/jammy"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "12.22.5~dfsg-5ubuntu1",
        "12.22.7~dfsg-2ubuntu1",
        "12.22.7~dfsg-2ubuntu3",
        "12.22.9~dfsg-1ubuntu2",
        "12.22.9~dfsg-1ubuntu3",
        "12.22.9~dfsg-1ubuntu3.1",
        "12.22.9~dfsg-1ubuntu3.2",
        "12.22.9~dfsg-1ubuntu3.3",
        "12.22.9~dfsg-1ubuntu3.4",
        "12.22.9~dfsg-1ubuntu3.5",
        "12.22.9~dfsg-1ubuntu3.6",
        "12.22.9~dfsg-1ubuntu3.6+esm2"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "libnode109",
            "binary_version": "18.19.1+dfsg-6ubuntu5"
          },
          {
            "binary_name": "nodejs",
            "binary_version": "18.19.1+dfsg-6ubuntu5"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:24.04:LTS",
        "name": "nodejs",
        "purl": "pkg:deb/ubuntu/nodejs@18.19.1+dfsg-6ubuntu5?arch=source\u0026distro=noble"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "18.13.0+dfsg1-1ubuntu2",
        "18.19.1+dfsg-2ubuntu4",
        "18.19.1+dfsg-6ubuntu1",
        "18.19.1+dfsg-6ubuntu2",
        "18.19.1+dfsg-6ubuntu5"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "libnode115",
            "binary_version": "20.19.4+dfsg-1"
          },
          {
            "binary_name": "nodejs",
            "binary_version": "20.19.4+dfsg-1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:25.10",
        "name": "nodejs",
        "purl": "pkg:deb/ubuntu/nodejs@20.19.4+dfsg-1?arch=source\u0026distro=questing"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "20.18.1+dfsg-1ubuntu2",
        "20.19.2+dfsg-1",
        "20.19.4+dfsg-1"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "libnode127",
            "binary_version": "22.22.1+dfsg+~cs22.19.15-1ubuntu1"
          },
          {
            "binary_name": "nodejs",
            "binary_version": "22.22.1+dfsg+~cs22.19.15-1ubuntu1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:26.04:LTS",
        "name": "nodejs",
        "purl": "pkg:deb/ubuntu/nodejs@22.22.1+dfsg+~cs22.19.15-1ubuntu1?arch=source\u0026distro=resolute"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "20.19.4+dfsg-1",
        "20.19.5+dfsg+~cs20.19.12-4",
        "22.21.1+dfsg+~cs22.19.0-6ubuntu4",
        "22.22.0+dfsg+~cs22.19.6-1ubuntu2",
        "22.22.0+dfsg+~cs22.19.13-2ubuntu1",
        "22.22.1+dfsg+~cs22.19.15-1ubuntu1"
      ]
    }
  ],
  "aliases": [],
  "details": "An incomplete fix for CVE-2024-36137 leaves `FileHandle.chmod()` and `FileHandle.chown()` in the promises API without the required permission checks, while their callback-based equivalents (`fs.fchmod()`, `fs.fchown()`) were correctly patched. As a result, code running under `--permission` with restricted `--allow-fs-write` can still use promise-based `FileHandle` methods to modify file permissions and ownership on already-open file descriptors, bypassing the intended write restrictions. This vulnerability affects **20.x, 22.x, 24.x, and 25.x** processes using the Permission Model where `--allow-fs-write` is intentionally restricted.",
  "id": "UBUNTU-CVE-2026-21716",
  "modified": "2026-05-20T15:24:36Z",
  "published": "2026-03-30T20:16:00Z",
  "references": [
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2026-21716"
    },
    {
      "type": "REPORT",
      "url": "https://www.cve.org/CVERecord?id=CVE-2026-21716"
    },
    {
      "type": "REPORT",
      "url": "https://nodejs.org/en/blog/vulnerability/march-2026-security-releases#cve-2024-36137-patch-bypass---filehandlechmodchown-cve-2026-21716---low"
    }
  ],
  "related": [],
  "schema_version": "1.7.0",
  "severity": [
    {
      "score": "CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N",
      "type": "CVSS_V3"
    },
    {
      "score": "medium",
      "type": "Ubuntu"
    }
  ],
  "upstream": [
    "CVE-2026-21716"
  ]
}



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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

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Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.


Detection rules are retrieved from Rulezet.